We also decided to beef up the rear Stabilizer bar, the first one was in our opinion a bit weak, so we ended up with a tube inside a tube style. Sort of what several ProMods are using.
I wanted it as rigid as possible since we use a 3-link instead of 4-link. It's A non tested solution and I think this will help to make the 3-link work as we want.
A CAD rendering and the final product.